diff --git a/src/Pagination/ResourceCursor.php b/src/Pagination/ResourceCursor.php
index 470ee92..a771104 100644
--- a/src/Pagination/ResourceCursor.php
+++ b/src/Pagination/ResourceCursor.php
@@ -27,7 +27,7 @@ public function __construct(
      * @return mixed
      */
     #[\ReturnTypeWillChange]
-    public function current()
+    public function current(): mixed
     {
         return $this->currentPage->getItems()[$this->currentIndex];
     }
@@ -52,7 +52,7 @@ public function next(): void
      * {@inheritdoc}
      */
     #[\ReturnTypeWillChange]
-    public function key()
+    public function key(): mixed
     {
         return $this->totalIndex;
     }